William   snodgrass



@hitch p faire atna't @Hirn WILLIAM rsNoneInIss, or MAcoMB-1 ILLINOIS, AssIe-Non To HIMSIILF AND JAMES srA'rLER, or SAME PLACE.

Letters Patent No. 66,405, dated July 2, 1867.

IMPROVEMENT IN WAGON-HUB BORING MACHINE.

TO ALL WHOM I'l MAY CONCERN Be it known that I, WILLIAM SODGRASS, of Macomb, in the county of McDonough, and State of Illinois, have invented a new and improved Machine for Boring Hubs for Wagons, dto.; and I do hereby declare the following to he a full and correct ldescription `of the same,lsuihcient to enable others skilled in the art to which my invention appertains to fully understand and use thesame, reference being had tothe accompanying drawings, making part of this specification, and iii which- Figure 1 is a plan of my improved machine.

Y Figure 2 is a longitudinal vertical section of the same, in line a: 2:, fig. 1.

Figure 3 is a detached view of part of the same hereinafter described, and

Figure 4 is a cross-vertical section, on the line y y, iig. 1.

Similar letters of referenceindicate corresponding parts in the several figures.

The nature of my invention consists in so pivoting the frame ir. which the chuck on the working-shaft is held that the 'position' of the hub towards the cutting-bar may be varied according to t'he size and shape of the bore` required; further, in connecting the two chucks between which the hub is held by means of a. strap, one end being atta'chcd to each chuck also in a novel way of giving `motion to the vcarriage holding the` cuttingbar, and automatically throwing the same out of rfear when the bore ismade; and lastly, in novel means of laterally adjustingv the pivotcd cutting-bar. 4

A, in thcrdrawings, represents the main frame of my machine, on` the top platesB B of which the carriage C slides. This carriage has orrits front end two uprights, D D, whichform bearings for the stationary screw E, provided with a hand-wheel, F, by means of which the screw is operated. Loose on this screw, between the uprights D D, is a nut, G, provided at its top and bottom side with a pin, a, each working inra slot, I, in the forked end c cof the cuttingbar H, which is pivoted at d on the rear end of the carriage D, to one side of which is attached a spring, I, the. free end of which terminates in a flat piece, J, sliding on and'rmly pressed against the top plate B to steady the movement of the carriage. To an upright, K, onthe opposite side of the carriage, Aa slotted plate, L, is secured by means of the. set-screw e, so that the plate L can be set forward or back at pleasure. i l

i At the rear part of the frame A are the uprights M M', braced by the cross-pieces N N', which latter are provided at theirentre with openings forming boxes forthejournals O O of the yoke P, in which the central chuck Q moves freely on bearings or friction-rollers, being held by projections ff on both sides ofthe yoke. The chuck Q is provided at its rear with a screw-thread, Q', and over it is a semicircular brace, R, attached to the uprights M M', and forms bearings for the set-screws g g, the rear ends of which bear against the yoke P.

S S are horizontal pieces rmly attached to the journals O O of the yoke, and braced by the uprights TT, in which latter are the bearings of the working-shaft U, which, between the uprights T T, is providedwith a screw-thread, z, on which two nuts, and lr, move, which servo to set the shaft U, at the front end of which -1s A a conical chuck, V. The two chucks are each provided with a loop, l, and connected to each other by a strap,

m, having hooks at its ends which hook into the loops Z, as shown in iig. 1.

Pivoted in the horizontal pieces S Sl are two braces, W, the frontends of which are provided with slots, u.

Set-screws o passing through the slots n and into projection 2J on the uprights M M', hold the braces securely. Grasping thejournal O, and securely attached to the same, is the cross-har g, provided with three upright pieces, r r1 r2, in the irsttwo of which are the bearings of the hollow shaft s bearing the toothed wheel el, to-

which motion is impartedY by the screw-thread Q on the front of the chuck` Q. Into the hollow shaft s ts the 'small end of the sliding-shaft 32, which yhas its outer bea-ring in the upright r2, and is moved by a hinged piece, t, grasping the end of the shaft .52. This piecet is provided at its top with a pin, t1, moving in an oblique slot in the sliding piece t2, which again is moved by the lever a. The wheel s1 is provided with a pin, s3, and the shaft s2 with a pin, s, so that when the shaft s2 is moved towards the shaft s, the pin sa will strike against the pin s4 and force the shaft g to revolve. On this latter shaft s is fastened a rope or chain, u, the other end being attached tothe carriage C. An elbow-lever, w,'is pivoted to the top plate B of the-frame A in such a manner that when the'plate L strikes its arm w the other arm will move the lever a,A and thus throw the shaft s2 out of gear with the shaft s.. i

The operation of my machine is as follows: The nuts z' and 7c are turned forward on the shaft U, which allows the latter to be drawn back, so that the hub to bebored can be placed between the two chucks V and Q The nut i is then turned back, forcing, as its rear end begins t'o bear against the upright .'l, the shaft V, bear ing the chuck V, forward towards the chuck Q untilpthe hub is firmly held between the two. The nut is then turned back, and serves to hold the nut z' from revolving on the shaft. The strap m is now hooked on to the chucks, and motion applied by any suitablemeans to the shaft U. The carriage, at this point of the operation, is at the extreme front of the frame A, and the lever a pressed in towards the frame, thus connecting the shaft s2 with the shaft s. As the chuck Q revolves the screw-thread Q revolves the toothed wheel s, and with it the Shaft s?, which winds up the rope u, and draws the carriage C to the rear. AThe cutting-bar H meanwhile cuts the hole into the hub. s

llVhen 'the'carriage has ymoved forward to that point where the plate L strikes the arm w of the bell-crank lever w, its other arm moves the lever a and disconnects the shaft e3 from the shaft s, thus stopping the carriage. The plate beingvprovided witha slot, the same can be setso as to lalways strike the lever w when the cutting-bar H has made the hole through the hub.

The cutting-bar L being pivoted. to the front'of the carriage can be set at an angle to the hub by means of the screw-shaft E. But when the cutting-bar isset obliqnely to the hub, when Vthe latter is in direct line with the rear frame, and at right angles with the rear end of the carriage, the hole bored would be a perfectly straight one. To bore avconical hole into the hub the rear frame, attached to the journals O O of the yoke'P, is moved laterally, after loosening the screws o, and allowing the braces `W to move by means of thetslots n, by means of the set-screws g g', one of which is screwed out, while the other is screwed in, in proportion. -Both screws being tightened when the frame is in the desired position, the latter is securely and firmly held by the same and the braces W, the screws having been tightened again. The cutting-bar in boring the hole comes nearer and nearer to the centre of the hub, according to the position. given to it and the frame, which, of course, lwill make the bore conical. By adjusting the cutter-bar by means of the screw E, it may be made to cut light or heavy, as desired, and by adjusting the rear frame the hole maybe bored more or less tapering to fit the box.

In operating my machine I place the hub between the chucks after the spokes are put in and the felloes are on. It then acts as aly-wheel, and assists in giving steadiness to the motion; and I am also able to cut off the ends of thev spokes if they project too far within the hub.

Having thus described my invention, what I claim, is-

1. The laterally adjustable frame, having the chucks V Q, mounted therein, in combination with the cutting and feeding mechanism, arranged to operate as and for the purpose set forth.

2. The cutter-bar H, pivoted upon the front end of the carriage C, in combination with the screwrod E mounted4 on the carriage, and arranged to operate the cutter-bar as described.`

3. The strap fm, or its equivalent, arranged to unite the independent 'chucks V and Q for the purpose of causing both to revolve together when motion is applied to one, substantially as herein set forth.

4. Feeding the cutter-bur to its work by means of the screwthread Q on the chuck Q, wheel S mounted on the shaft S, and cord u attached to the carriage C, when said parts are arranged to operate as herein shown and described.

WM. SNODGRASS.

Witnesses:

LEE A. SIMMONS, GEORGE WETHsRnoLn. 

